Robin Mark is certainly one of the tops in his genre of music. The book presents the music very thoroughly, but is for accomplished musicians, who can read well, and then are able to add the dynamics and spirit to the songs. The lead vocal is often written in the bass clef, as Robin is a baritone, but other parts written for "praise team", or a harmony voice, are illustrated on SATB staffs. If you want good music and can handle just a bit of a challenge, you will enjoy the book.